With 3 days and 4 nights to acclimatize for a July 25th 3 day summit attempt on Whitney...is summiting white mountain a good idea on maybe the 2nd acclimatization day or is it too strenuous?

Given my multi-day attempt on Whitney, it seems like a good idea to me to experience some real altitude before but maybe 14,200 is too much real altitude with only one day prior to acclimatize at all.